Said richard l



Nu. |5,22|. Patented Nov. 29, |898. l J. w.,. n. L. & H. t. mwlN.

AUTOMATIC PEBPETUAL CALENDAR.

(Application med June 27, isps.) 1 (No Model.) l2 Sheets-Sheet l.

ffy-1. l

, A A l n l Patented Nqv.29, |898.

2 Sheets-Sheet 2.

No. e|5,22|. y

J. w., n.1. & H. T. IRWIN AUTOMATIC PEHPETUAL CALENDAR.

(Applic'ation led June 27, 1898.) (No Model.)

, la. III//i HIl Elven/fors 1N: woRms Ps-rsns co.. Puo'mu'mo., wmamcrou. D. c.

UNITED STATES yPATENT OFFICE.

JOHN W. IRWIN, RICHARD L. IRVIN, AND HARRY T. IRWIN, OF WASHING(-A TON, DISTRICT OF COLUMBIA; SAID RICHARD L. IRWIN AND HARRY T. IRWIN ASSIGNORS TO SAID JOHN W. IRWIN.

AUTOMATIC PERPETUAL CALEN DAR.

SPECIFICATION forming part of Letters Patent No. 615,221, dated November 29, 1898.

Application filed June 27,1898.

To all whom, t may concern:

Be it known that we, JOHN W. IRWIN, RICHARD L. IRWIN, and HARRY T. IRWIN, citizens of the United States, residing at Washington, in the District of Columbia, have invented a certain new and useful Improvement in Automatic Perpetual Calendars, of which the following is a full, clear, and exact description.

This invention relates to that class of me-` chanical calendars which may be used for an indefinite period and which must be set day by day by the user. Such calendars are sometimes referred to as or designated perpetual calendars, and in our invention we provide a perpetual calendar which is essentially automatic in so far as concerns the coperation of the day, date, and month indicators.

In the construction of our calendar we employ three horizontal rotatingcylinders, one of which contains the names of the days of the week, another of which contains numbers from 0 to 31, and has in addition to its rotary movement a progressive vertical movement, whereby the numerals, which are fixed and are arranged in a spiral path or line, are successively brought into alinement with the appropriateV week-day names, and another cylinder containing the'names of the months. These several cylinders are provided with connecting mechanism, whereby they may be moved in unison at appropriate times, and in addition the numeral-cylinder is provided with mechanism whereby it may be disconnected from the cylinders and be given a reverse movement in order to reset it foranew month.

Our invention consists in certain constructions and combinations of parts, all as hereinafter more particularly set forth and finally claimed.

In the accompanying drawings, illustrating our invention, in the several figures of which like parts are similarly designated, Figure l is a front elevation. Fig. 2 isa sectional internal elevation. Fig. 13 is a vertical section with the datecylindertraversing device partly in section and partly in elevation. Fig. 4 is a partly-sectional elevation taken serial No. 684,580. (It, model.)

substantially at right angles to the section of 5o Fig. 2. Fig. 5 is a cross-section taken in the plane of line 5 5, Fig. 3, and looking upward. Fig. 6 is a vertical cross-section of the datecylinder. Fig. 7 is a top plan view with the casing removed. Fig. Sis a perspective view of part of the cylinder-actuating device, and Fig. 9 is the date-slipdeveloped and on small scale.

Without therebylimiting our invention to details of construction we will proceed to de- 6o scribe thesame in detail with reference to the accompanying drawings, which illustrate a form of our invention which has been successfully used. a is a base, in the instance shown rectangular in outline, having a removable bottom a and surrounded by a cylinder a2, in which are the openings a3, a4, and a5 for the exposure of the month, date, and

` day, respectively, and thiscylinder is surmounted by a cap-piece b, which is provided 7o with a cover b', these several parts a, a', c2, b, and b being detachable.

The cylinder c has applied to it abbreviations of all ofthe days of the week, and preferably'for two weeks. This cylinder has its 75 upper end closed, as at c', and said end c' is provided with suitable depressions, (here shown as slots 02,) and the cylinder further is provided with peripheral notches c3.

d is a spindle or shaft provided with a ta- 8o ble or ilange d', upon which the cylinder cis supported, the top c of the cylinder being perforated for the free passage of the said spindle d. The spindle d is stepped in the bottom a or otherwise secured to rotate Within the casing. Above the top c is a pawl-carrier e, fast to the spindle d and turning with it, and this pawl-carrier carries a pawl e', normally depressed by a spring e2 into engagement lwith the notches c2, and thereby 9o adapted to rotate the cylinder c in one direction as the spindle is rotated. The spindle is provided with a sleeve f, which in order to permit a slight lost motion is secured thereto loosely by apin f on the spindle engaging a slot f2 in the said sleeve, and this sleeve is extended upwardly and beyond the cover b and is adapted to receive a knob g, by which the spindle may be rotated. The sleeve f has an eccentric projection f3, to which is pivoted a pawl 7L, the said pawl having a slot-and-pin connection 7L -with the pawl-carrier e and normally driven in one direction by a spring h2, fastened to the pawl-carrier at one end and having its free end in active engagement with the said pawl 7L. The active end of the pawl h is of substantially V shape, as shown in Fig. 7.

The cap-piece l) is provided with as many inwardly-projecting teeth t' as there are days of the week inscribed upon the cylinder cin this instance fourteen-and as the spindle is rotated in order to bring a new day into position the pawl c' carries the said cylinder forward until the pawl 7L engages one of the teeth z', when its motion is arrested, and as soon as the pressure upon the knob is released the spring h2 withdraws the pawl 7L from engagement with the tooth and sets the shaft or spindle in position for a fresh progressive movement. A pawl j, pivoted in the cappiece b, engages the peripheral notches c3 to prevent back motion of the day-cylinder.

The date-cylinder 7.; is supplied with numerals from O to 31, arranged continuously thereon in a spiral path. (See especially Fig. 9.) This cylinder 7c is provided with a closed top 7d, from which depends a screw-threaded iiange 7a2, which engages a complemental screw-threaded column Z,which rises from the bottom a' of the casing. The top piece 7c of the cylinder also has a tube 7c3, by means of which the said cylinder is fitted to the spindle d. This cylinder 7.: is given a rotary motion coextensive with the motion of the day-cylinder by means of apin m, depending from the table d' and entering a hole in the top 7a of said date-cylinder, and the said date-cylinder has not only this diurnal rotary motion, but it also has a vertical traverse by means of the screw-threaded portions 702 and I, whereby the numbers are displayed in numerical succession from l to 3l and one at a time.

The month-cylinder 1t is mounted upon the base a in any suitable manner, and We have herein shown lugs n' ln' to engage a iiange n2 of the said base for this purpose. This month-cylinder has the names of the months arranged in sequence, and it is adapted to be turned by means of the following mechanism, which cooperates with the diurnal mechanism. The lower edge of this month-cylinder n is provided with a series of inclines n.3, correspondingin number with the num ber of the months inscribed on said cylinder, and each incline terminates in an angular notch n4. A spring-dog o, pivoted to some fixed portion of the casing, is normallyin engagement with one or another of these notches n4 to hold the month-cylinder in any given position of exposure.

The date-cylinder 7o has a depending springfinger 17 and a spring-pawl q, the latter having the oilset nose-piece q', which projects into the path of the inclined an d notched bottom of the said month-cylinder. The inger p is hereinafter referred to as the dog-actuator or trip or tripping device.

As the diurnal mechanis1n-namely, the day-cylinder and the date-cylinder-are rotated day by day the date-cylinder descends upon the column Z, and thus removes the spring p and the dog q from cooperative proximity to the month-cylinder. Vhen the end of a month is reached, the date-cylinder must be reset to the 0, and in order to do this the knob is given a reverse rotation, and thereby the said date-cylinder is traversed upwardly upon the column until l is reached. At this time the spring-finger p is brought adjacent to the dog o and presses its nose out of engagement with the notch n4 in the end of the month-cylinder, while the nose q engages one of the notches n4 and carries 'forward the month-cylinder the distance between 1 and O on the date-cylinder-that is to say, it advances the lnonth-cylinder not only one month, but one notch-and meanwhile the spring-linger p having passed the nose of the dog o said dog is free to engage the next succeeding notch and to hold the month-cylinder in the newly-adjusted position. Then when the diurnal mechanism is operated the nose q backs out of the notch into which it had fallen and, yielding vertically under the tension of its spring, passes along the inclined portion n3 without moving the month-cylinder, and as said date-cylinder is progressively advanced the said springpawl q is finally freed from contact with the month-cylinder. Thus it will be seen that the day-cylinder and the date-cylinder coperate in diurnal motion and that the date-cylinder is capable of cooperation with the month-cylinder either monthly or at any other time by reverse movement thereof and that the motions of the several cylinders are effected by a single knob common to all, and finally that each cylinder has an individual motion, and with respect to this last statement it is to be observed that the day-cylinder an d the monthcylinder have individual stop mechanisms and that while the date-cylinder carries the day-cylinder with it in the forward progression the said date-cylinder is restrained from reverse motion when the date-cylinder is reversed to set for a new month.

Ve prefer to arrange our calendar in a vertical position, soas to read day iirst, date next, and month last; but other arrangement is within the scope of our invention.

Most of the parts of the calendar may be struck up of sheet metal in a very economical manner. These last features and others may be adopted at pleasure within the scope of our invention.

l. A calendar, having a day-cylinder and means to move it diurnally, a date-cylinder connected and movable With the day-cylinder, and having also an independent reverse move- ICO IIO

operation upon the reversal of the date-eyl- Y inder and immediately prior to the forward movement of the date-cylinder necessary to bring into view the date, substantially as described.

2. A calendar, having a rotary day-cylinder and means to move it dinrnally, and a monthcylinder and means to move it monthly, combined with a date-cylinder movable diurnally with the day-cylinder, and having also an upand-down movement and capable of reverse movement relatively to its diurnal motion, and fixed numerals from O to 3l, arranged in numerical sequence upon its exposed surface, substantially as described.

3. In a calendar, a day-indicator having its periphery provided with a notch for each day indicated thereon, a detent adapted toen gage the said notches successively to prevent backward movement of said indicator, a spindle provided with a support on which said dayindicator loosely rests, and a pawlcarrier fixed to said spindle and having a pawl adapted to engage a depression in the top of the day-cylinder to give to said day-cylinder a diurnal motion, substantially as described.

4. In a mechanical calendar, a day-cylinder and a date-cylinder operatively connected for diurnal motion, combined with a rotary spindle having a table upon which the day-cylinder is supported loosely, a detent for preventing back motion of the day-cylinder, a pawlcarrier fast to said spindle and carrying a pawl which engages depressions in the daycylinder to eiect the forward 4feed or diurnal motion of the day-cylinder, a pawl carried by said pawl-carrier and having an independent motion imparted from the spindle, and a series of teeth with which said pawl engages for limiting the forward throw or movement of the day-cylinder, and a positive connection between the spindle and the date-cylinder to cause said date-cylinder to move diurnally with the day-cylinder, substantially as de-` scribed. Y

5. In a mechanical calendar, the day-cylinder, a date-cylinder and a month-cylinder constructed and arranged for conjoint operation, combined with a spindle common to all, a

sleeve on said spindle, a knob applied to said sleeve by which the spindle may be turned both forwardly and backwardly, and a pawl connection for imparting a diurnal motion to the day and date cylinder, and deriving its motion from the spindle and sleeve, substantially as described.

6. In a mechanical calendar, the combination with a date-cylinder having a diurnal motion, capable of reverse movement and also having an up-and-down motion, a monthcylinder capable of rotary movement, and having a series of notches and adjacent inclines, a detaining-dog to hold the said monthcylinder in adjusted position, and means carried by the date-cylinder and adapted to cooperate with the said dog and the saidnotched and inclined end of the month-cylinder, to

advance the said month-cylinder month byy month, substantially as described.

7. In a mechanical calendar, a day-cylinv der, a date-cylinder, and means to connect them for diurnal motion, the date-cylinder having also a rising-andfalling and a reverse movement, and provided with a depending dog actuator or trip, and a pawl,.in combination with a month-cylinder, having its lower edge provided wit-l1 notches and adjacent inclines with which the dog-actuator of the datecylinder cooperates for moving the month-cylinder progressively, and a dog for holding the date-cylinder until released by the dog-actuator-tripping device of the date-cylinder, substantially as described. Y

8. In a mechanical calendar, the combination of a day-cylinder and a date-cylinder, adj usted for diurnal motion, the said date-cylinder also having a conjoint vertical movement, and capable of reverse movement independently of the day-cylinder, and having fixed numbers from O to 31 arranged in numerical sequence and in a spiral line upon its exposed face, and a month-cylinder capable of rotary motion conjointly with the datecylinder whenv said date-cylinder has its brought opposite the month then exposed, substantially as described.

In testimony whereof we have hereunto set our hands this th day of June, A. H1898.

JOHN W. IRVVlN. RICHARD L. IRVIN. HARRY T. IRWVIN.

Witnesses:

CHAs. J. WETZEL, WM. H. WETZEL.

IOO 

